Energy storage device



FIG. 1 is a top, front and left side perspective view of the energy storage device;

FIG. 2 is a bottom, rear and right side perspective view of FIG. 1 ;

FIG. 3 is a front elevational view of FIG. 1 ;

FIG. 4 is a rear elevational view of FIG. 1 ;

FIG. 5 is a left side view of FIG. 1 ;

FIG. 6 is a right side view of FIG. 1 ;

FIG. 7 is a top plan view of FIG. 1 ;

FIG. 8 is a bottom plan view of FIG. 1 ;

FIG. 9 is an enlarged view of portion 23 in FIG. 1 ;

FIG. 10 is an enlarged view of portion 24 in FIG. 1 ;

FIG. 11 is an enlarged view of portion 25 in FIG. 2 ;

FIG. 12 is an enlarged view of portion 26 in FIG. 2 ;

FIG. 13 is an enlarged view of portion 27 in FIG. 8 ;

FIG. 14 is an enlarged view of portion 28 in FIG. 8 ; and,

FIG. 15 is an enlarged view of portion 29 in FIG. 8 .

The broken lines in the drawings illustrate portions of the energy storage device which form no part of the claimed design. 

CLAIM The ornamental design for an energy storage device, as shown and described. 